CVE-2026-45258 Multiple vulnerabilities in the sound(4) mmap path

dspmmapsingle validated the requested mapping by checking the sum of the user-supplied offset and length against the buffer size. This addition could overflow, so that a large offset and length wrapped around and passed the check. The offset was then narrowed from 64 to 32 bits when converted to ...

CVE-2026-49417

The FreeBSD sound(4) driver contains a memory-safety error in its mmap(2) support. Specifically, the audio buffer backing a mapping can be freed when the device is closed while the mapping remains valid. This allows the freed memory to be reused elsewhere while still accessible through the stale ...

CVE-2026-49417 Multiple vulnerabilities in the sound(4) mmap path

Second, the audio buffer backing a mapping could be freed when the device was closed even though the mapping remained valid. The freed memory could then be reused elsewhere while still accessible through the stale mapping. The /dev/dsp device nodes are world-accessible by default. On a system wit...